Shares of Portola Pharmaceuticals Inc (NASDAQ: PTLA) were down 10 percent to $49.57 after the company's Friday announcement that the FDA has extended its review period for the biologics license application for AndexXa, an anticoagulant antidote product candidate, by 90 days.

Long Blockchain Corp (NASDAQ: LTEA) was down, falling around 19 percent to $4.89 after dipping 13.02 percent on Friday.

Commodities

In commodity news, oil traded up 2.5 percent to $59.93 while gold traded up 0.69 percent to $1,287.60.